首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   6篇
  免费   0篇
综合类   6篇
  2010年   1篇
  2007年   1篇
  2004年   1篇
  2003年   2篇
  2001年   1篇
排序方式: 共有6条查询结果,搜索用时 187 毫秒
1
1.
IntroductionComputervision,alsocalledmachinevision,isthekindoftechnologyusedfortheidentification,trailing,measurementandevaluation,etc.,oftheobjectsthroughthesubstitutionofcameraandcomputerforhumanvision.Stimulatedbyboththerapidprogressofthecomputerindustryandthedevelopmentofvariousdisciplinesofartificialintelligence,suchasimageanalysis,parallelprocessingandneuralnetwork,etc.,computervisionsystemsarebecomingmoreandmorepracticableandbeingusedintheresearchofagreatdealofcomplicatedvisionprocess,h…  相似文献   
2.
In the present paper, we propose an approach of combination prediction of chaotic time series. The method is based on the adding-weight one-rank local-region method of chaotic time series. The method allows us to define an interval containing a future value with a given probability, which is obtained by studying the prediction error distribution. Its effectiveness is shown with data generated by Logistic map.  相似文献   
3.
Polyoxometalate (POM) has promising antiviral activities. It shows broad-spectrum inhibiting ability, high efficiency, and low tox-icity. Experimental assays show that titanium containing polyoxotungstates have anti-influenza-virus activity. In this paper, the bind-ing mechanisms of five isomers of di-Ti-substituted polyoxotungstate, [α-1,2-PTi2W10O40]7– (α-1,2), [α-1,6-PTi2W10O40]7– (α-1,6), [α-1,5-PTi2W10O40]7– (α-1,5), [α-1,4-PTi2W10O40]7– (α-1,4) and [α-1,11-PTi2W10O40]7– (α-1,11), to five subtypes of influenza virus A neuraminidase (FluV-A NA) were investigated in the context of aqueous solution by using molecular docking and molecular dynamics studies. The results show that the isomer α-1,2 is superior to other isomers as a potential inhibitor to neuraminidase. The positively charged arginine residues around the active site of NA could be induced by negatively charged POM to adapt themselves and could form salt bridge interactions and hydrogen bond interactions with POM. The binding free energies of POM/NA complexes range from –5.36 to –8.31 kcal mol–1. The electrostatic interactions are found to be the driving force during the binding process of POM to NA. The conformational analysis shows that POM tends to bind primarily with N1 and N8 at the edge of the active pocket, which causes the conformational change of the pincers structure comprising residue 347 and loop 150. Whereas, the active pockets of N2, N9 and N4 are found to be more spacious, which allows POM to enter into the active pockets directly and anchor there firmly. This study shows that negatively charged ligand as POM could induce the reorganization of the active site of NA and highlights POM as a promising inhibitor to NA despite the ever increasing mutants of NA.  相似文献   
4.
A new researching method on clothing comfort perception is developed. By it the skin surface temperature changes and subjective psychological perception of human body sections stimulated by the same cold stimulation are studied. With the multiple comparison analysis method the changing laws of skin temperature of main human body sections is obtained.  相似文献   
5.
Based on the sticking point of the low intelligence of the existing management decision system, this paper puts forward the idea of enriching and refining the knowledge of the system and endowing it with the ability to learn by means of adopting three types of heterogeneous knowledge representation and knowledge management measures. At length, this paper outlines the basic framework of an intelligence system for the sake of management decision problem.  相似文献   
6.
热横向射流近壁区的温度变化研究   总被引:8,自引:0,他引:8  
当热射流垂直入射至主流中时,在宽广的射流与主流流速比(0.01-1.50)下,测量了3个不同区域内近壁区流体的温度随流速比变化,通过实验发现,横向射流的流动形式复杂,不同区域近壁区流体的温度随流速比变化的情况不尽相同,在射流下游区,当流速比大于0.40以后,射流核心区已基本离开近壁处,在射流管出口处,低流速比时射流出口温度分布极不均匀,在射流管内,低流速比时存在有紊动区,当流速比大于0.05以后,射流管内温度已不受主流的.影响。  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号